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Finding the Fourth Proportional to 66,552.86, 99,834.08 and 20,956.65

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Solution

The fourth proportional to 66,552.86, 99,834.08 and 20,956.65 is: 31,436.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,552.86 : 99,834.08 = 20,956.65 : x
  2. Step 2: Convert to fraction form
    66,552.86/99,834.08 = 20,956.65/x
  3. Step 3: Cross multiply
    66,552.86x = 99,834.08 × 20,956.65
  4. Step 4: Simplify right side
    66,552.86x = 2,092,187,767.85
  5. Step 5: Solve for x
    x = 2,092,187,767.85/66,552.86
  6. Step 6: Final answer
    x = 31,436.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.